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金属基复合材料的性能、应用、成本等在很大程度上取决于材料的制造技术,因此研究和发展有效的制造技术一直是金属基复合材料研究中的最重要的问题之一。本文提出了一种基于S形流道的固体颗粒-金属流体混合方法,并采用欧拉-离散相模型分析计算了该流道内的颗粒-流体混合过程。研究结果表明,S形流道内流体具有周期性变化的流动方向及流速,同时在横截面内存在旋转方向周期性改变的涡流,能够强化颗粒在金属流体中的分散过程。分析了颗粒在S形通道内的均匀度,在第三级出口处的颗粒均匀度达到0.915,表明该方法能够较好的实现固体颗粒在金属液内的均匀分散,进而实现颗粒增强金属基复合材料的制备。
The performance, application and cost of metal matrix composites depend largely on the material manufacturing technology. Therefore, research and development of effective manufacturing technology has been one of the most important issues in the research of metal matrix composites. In this paper, a new solid particle-metal fluid mixing method based on S-shaped flow channel is proposed, and the particle-fluid mixing process in the flow channel is calculated by Euler-Discrete Phase Model. The results show that the flow in the S-shaped channel has a periodically changing flow direction and flow velocity, and there is a swirling in the cross-section that periodically changes in the direction of rotation, which can strengthen the dispersion of the particles in the metal fluid. The uniformity of the particles in the S-shaped channel was analyzed. The uniformity of the particles at the outlet of the third stage reached 0.915, which showed that the method could achieve uniform dispersion of the solid particles in the molten metal and achieve particle-reinforced metal matrix composite Preparation of materials.